Invented by Pete Doherty and Carl Barat (formely of the Libertines). The mythical place where the ship 'The Albion' is sailing. It is a dreamland where there is no laws, boundaries, and there is liberty everywhere. Dropped slightly by Carl Barat in his new band 'Dirty Pretty Things' but Pete Doherty in his new band 'Babyshambles' still believes in it - hence the debut album 'Down in Albion'

Where cigarettes grow on trees and the benches are made of denim, the realm of the infinitive, your idea of heaven/perfection, founded by the greatest musicians of our time, Mister Carlos Barat and Mister Peter Doherty ;]

"You know – Arcadia? The realm of the infinity? It's a poet's corner. This is the code by which we live our lives. This is the pact we've sworn all those years ago that turned us all from enemies into companions and wayfarers and travellers on the seas of Albion. It's not a cult or a religion – it's an awareness of your surroundings; you're not gonna force yourself on anyone and, equally, no-one's gonna force themselves on you. And it's about community and pleasure. It came from a whisper through the trees. It came from a crack in the pavement. It can also come when you open a bag of crisps, or when you kick a football against a goalpost. Even if I was winding you up, it would still be true, because Arcadia and the Arcadian Dream is so deep, is so true to our hearts... There have been Arcadian gatherings over the years, but I think the best is yet to come. It can be as powerful as your imagination can allow it to be. But, it can also be as dark and twisted as your soul... Arcadia encompasses the infinite, and that's why it comforts me."

1) Various places, including a region of ancient Greece and a couple of cities.

2) Beaver, of any kind. Here's the backstory: Beaver College in Pennsylvania changed its name to Arcadia University partially due to the fact that "beaver" is slang for a woman's naughty bits. Now, you can use the word "arcadia" in place of the word "beaver". It's fun and no one will know what you're talking about.

1)
Arcadia is referenced in a bunch of poems and songs and stuff as a pastoral or idealistic place.